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A. F. DEVIGNE &'J. P. DURAND. SHBDDING MECHANISM FOR 1.001118.-

No. 452,451. Patented May 19,1891.

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110. 452,451. Patented May 19', 1891.

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A. P. DEVIGNE 8t J. P. D'URAND. SHEDDING MECHANISM FOR LOOMSF N0. 452,451. Patented May 19, 1891.

UNITED STATES PATENT OFFICE.

ANTOINE FRANCOIS DEVIGNE AND JEAN PIERRE DURAND, OF LYONS,

FRANCE.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 452,451, dated May 19, 1891.

Application filed May 21, 1887. Serial No. 239,257.

November 18,1886, Germany April 1, 1889,1T0. 46,439.

To all whom, it may concern.-

Be it known that we, ANTOINE FRANCOIS DEVIGNE and JEAN PIERRE DURAND, both at present residing at Lyons, in the Republic of France, have invented a new and useful Improved Shedding Mechanism for Looms, (for which we have obtained Letters Patent in France for fifteen years, dated the 27th of October, 1886, No. 179,169; in Belgium for fifteen years, dated the 13th of November, 1886, No. 75,223; in England for fourteen years, dated the 30th of December, 1886, No.17,09et; in Italy for fifteen years, dated the 26th of November, 1886, No. 227, Vol. 41, and in Germany April 1, 1889, No. 16,439,) of which the following is a full, clear, and exact descrip- This invention relates to the harness or mechanism for actuating the heddles of a power-loom in such manner that the heddles are both raised and lowered simultaneously and thus produce a thorough rising and falling shed.

Reference is to behad to drawings, forming wherein v Figure 1 is a front elevation of a loom embodying our invention, the cloth-beam being removed. Fig. 2 is a side elevation of the same. Fig. 3 is a plan showing the mechanism for actuating the heddles'. Fig. 4 is an enlarged horizontal section on line 4 at, Fig. 1. Fig. 5 is an enlarged vertical section on line 5 5, Fig. 4. Fig. 6 is an enlarged side view of the connection between the bracket-arm E and cross-bar E The same letters of reference indicate like parts in all the figures.

The tappet or pattern-chain D runs on a shaft A, driven by spur-wheels B C from shaft q, and passes around a shaft E, hung in bracket-arms E, that are adjustably carried by cross-bars E whereby the distance of shaft E from shaft A may be made to suit the length of the chain. This adjustment can be brought about by means of the slot s, Fig. 6,

the accompanying part of this specification,

' in the cross-bar E the screw R sliding in said slot and carried by arms E and the nut on said screw. Pendent-levers F, corresponding (No model.) Patented in France October 27, 1886 No. 75,223; in Italy November 26, 1886, XLI,

N0.179,169; in Belgium 227; in England December 30, 1886, No. 17,094, and in in number to the number of leaves of the heddles, are pivoted at their upper ends F, while their lower ends pass down through slots in horizontal slide-rods G, also corresponding in number to the heddles, so that whenever a tappet or stud of the tappet-chain comes against a lever F the corresponding rod G is slid longitudinally to the right. Each rod G is acted on by a spring G, which brings back the rods G to a fixed point, which is determined by a stud G on the rod G and checked by the abutment U. Each rod G acts on four hooks like those used in the jacquard and acting together in pairs-that is to say, the twooutside ones H being connected through rock-levers K with the top and the two inside ones I with the bottom of the same leaf or heddle K, as shown in Fig. 1, the former for raisingvand the latter for lowering the heddle. Pairs of griff-levers L receive an upand-down motion on a center L, Fig. 2, and engage with the hooks brought by the rods G into their path. Above each griff-lever is a second lever M, mounted on a rock-shaft M and carrying a sort of comb M said lever M serving both to guide the hooks and insure their regular spacing and alignment. The free ends of the two levers L and also of the two levers M at the same side of the loom are connected by cross-bars L M respectively, (see Fig. 2,) and to the middle of the cross-bar M is attached a pendent forked rod M which straddles the cross-bar L and forms a distance-piece between the levers L and M, and which allows the lower griff-lever to rise for a certain distance independent of the movement of the lever M, since the connectingpiece L between the grilf-levers slides in the lower slotted or forked end of the distancepiece M the object of which is fully stated hereinafter. The griff-levers L are moved up and down for acting on the series of hooks 1'1 and I by a double cam O, acting on the friction-rollers of a slotted sliding frame 0, whose upper end is guided between the rollers 0 The upper end of this slide is connected by a link 0 with a lever 0 fixed on a crossshaft 0 having at each side of the loom an arm 0 and connecting-rod 0 which takes hold of the cross-rod L, whereby the twogrit'f levers connected by said rod L receive a regular up-and-down movement, this operation being simultaneous at both sides of the loom. In their descent the griff-levers L engage those hooks which are brought into their path, and after completing their ascent those hooks which were engaged at the previous descent are released.

The hooks II and I are each provided with an extra limb L attached to a collar 2 on the stem of the hook, the extra limb passing through a round hole 0 in the corresponding rod G, (more fully illustratedin Fig. 5,) while the hook itself passes through a longitudinal slot R in said rod,so that the rod acts on the hook (to move it in or out of the path of the gritf-lever) through the medium of the extra limb L which acts as a spring-connection as well as a guide, and so facilitates the disengagement of the hook from the griif-lever when the latter rises.

It will be seen that the two outer series of hooks when acted on by the descending grifflevers raise the corresponding leaves of the heddles, while the inner series of hooks when so engaged lower them. hen, therefore, a tappet or stud of the chain D pushes the corresponding leverF and rod G to the right, the corresponding hooks of the two outer series II are brought into the paths of the outer griitlevers at the same time that the corresponding hooks of the inner series are moved out of the paths of the inner griff-levers, as shown in Fig. 1, so that the corresponding leaves of the heddles will be raised; butall the rods G which have not been so moved by the tappet-ehain are held in the normal position toward the left by the springs G, so that the corresponding hooks of the two on ter series are thereby held out of, while the eorresponding hooks of the two inner series are held in, the paths of the grii'f-levers, whereby theleaves of the heddles to which those hooks of the inner series are connected will be drawn down.

The disengagement of the hooks from the griff-levers is effected as follows: Each griffleverin its descent draws down acertain number of hooks, and through them the levers M, upon which the collars B which are firmly secured to the hooks, bear with a pressure due to special springs N, that are confined between these collars and a fixed abutment 'I. The levers M rise by the tension of a spring 11*, Figs. 2 and 3, attached at its upper end to a fixed point and at its lower end to a leverarm M fast on the rock-shaft M, to which levers M are fixed. The levers L and H rise together until the cross-bar M meets a stop P, Fig. 2, whereupon the levers M are arrested, while the levers L continue to be raised still farther, this being allowed by the slots If, in which rod L rests, said slotsbeing at the ends of lovers L, as in Fig. 2, the cross-bar L now resting in the upper part of the slot. As, however, the hooks are pressed downward by the springs N, so that their collars B always hear on the levers M, they stop with the latter, and the griff-levers L continue to rise by the action of the rod L, which rises to the upper part of the slots and continues to rise until the hooks become disengaged from the griff-levers L, the spring action of the limbs L which have been slightly flexed during the engagement of the hooks, moving the hooks quickly out of the path of the griff-levers. To limit the approach of the levers L and M while the former continue to rise, the cross-bar L enters the fork of the distance-piece M. %y this arrangement the working of each leaf of the heddles is quite independent of the others, and, moreover, the tension upon the leaves is nearly the same whether in work or at rest, a rising and falling shed being used for weaving all kinds of patterns, so that their motions balance one another, and each warp-thread at all times bears only its proper proportion of strain, which is conducive to economy in the maintenance of the harness. The levers F may of course be actuated by a pin-drum or other suitable means instead of a chain.

Having now described our invention,what we claim is- In a loom -he(1dle operating mechanism wherein the heddles are caused to move independently but simultaneously in opposite directions, so as to produce a rising and fallin g shed, the combination of the heddles K with the outer set of hooks H and the inner set of hooks I, respectively acting to raise and to lower corresponding heddles, as described, with the pairs of grid-levers L and levers M acting on the two sets of hooks and the spring N in the manner described, the slide'rods G, connected each to the hooks of both sets corresponding to the same leaf or heddle and pat-- tern-tappet, pattern-actuated levers F, and mechanism, substantially as described, for operating the levers L and M, the whole combined for operation as described, so that when the hooks of one series are in position for engagement by the griif-levers those of the other series are out of position for engagement, substantially as specified.

The foregoing specification of our improved loom signed by us this 25th day of April, 1887.

ANTOINE FRANCOIS DEVIGNE. JEAN PIERRE DURAND. Witnesses:

EUGENE REOTOR, 6 Place Raspail, Lyons, (Rhone) HENN FINEZ, 12 Rue (Zzt Fantasquez', Lyons, (Rhone) 

